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A student is studying the ways different elements are similar to one another. Diagrams of
atoms from four different elements are shown below.
Nucleus
Nucleus
Atom 1
Atom 2
Nucleus
Nucleus
Atom 3
Atom 4
Which two atoms are of elements in the same group in the periodic table?

In vapor-liquid equilibrium in a binary mixture, both components are generally present in both phases. how many degrees of freedom are there for such a system? the reaction between nitrogen and hydrogen to form ammonia occurs in the gas phase. how many degrees of freedom are there for this system? steam and coal react at high temperatures to form hydrogen, carbon monoxide, carbon dioxide, and methane. the following reactions have been suggested as being involved in the chemical transformation: